Category: Kubernetes, CKA, ReplicaSet, Labels, Selectors Introduction One of the biggest improvements of ReplicaSet over the old ReplicationController is its more expressive label selectors. ReplicationController supports only simple equality-based selectors such as: ReplicaSet introduces set-based selectors, allowing you to create much more flexible selection rules using matchExpressions. In this hands-on lab, we’ll explore all four ReplicaSet selector operators: We’ll also verify each operator by changing Pod labels and observing ReplicaSet’s
Category: Kubernetes
Kubernetes (often abbreviated as K8s) is an open-source container orchestration system for automating the deployment, scaling, and management of containerized applications.
In this blog, I will demonstrate: What is ReplicationController? A ReplicationController (RC) ensures that a specified number of Pod replicas are always running. If a Pod crashes or is deleted accidentally, Kubernetes automatically creates another Pod. Responsibilities Lab-1: Create a Single Pod Create an nginx Pod. Output Check the Pod. Output Delete the Pod Output Check again. Output Notice that Kubernetes does not recreate the Pod because it is an
A Kubernetes cluster consists of two main components: The recommended upgrade order is: In this tutorial, we will upgrade a Kubernetes cluster from v1.35.1 to v1.35.2 using kubeadm. Kubernetes Cluster Architecture Prerequisites Before starting the upgrade, ensure that: Current Cluster Version Example Output Part 1 ā Upgrading the Control Plane The Control Plane manages the Kubernetes cluster. It is responsible for scheduling Pods, maintaining cluster state, handling API requests, and
Level: Beginner ā IntermediateCategory: Kubernetes | DevOps | CKA | DockerAuthor: Sumit Bera š Introduction Kubernetes is an open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications. Before learning Deployments, Services, ReplicaSets, or Ingress, you should first understand Pods, because every application in Kubernetes runs inside a Pod. There are two methods to create Kubernetes resources: Every Kubernetes Administrator should know both methods because they
Kubernetes (often abbreviated as K8s) is an open-source container orchestration system for automating the deployment, scaling, and management of containerized applications. š¹ Key Points about Kubernetes: š¹ Why is Kubernetes important? ā In simple words:Kubernetes is like a traffic controller and caretaker for containers. It makes sure your applications always run smoothly, scale when needed, and recover automatically if something goes wrong. š¹ Main Components of Kubernetes Architecture 1. Master